Class: RfidServer

Inherits:
WEBrick::GenericServer
  • Object
show all
Defined in:
lib/event_handler/rfid_server.rb

Overview

La clase RfidServer representa el manejador de eventos del Middleware RFID, para el manejo de los eventos generados por las capturas de etiquetas RFID. RfidServer es una clase concreta de la clase WEBrick::GenericServer que implementa un servidor para el manejo de un lector RFID. Adicionalmente recibe comandos que permiten consultar, registrar y liberar el lector RFID, asi como tambien comandos para consultar la base de datos SQLite de eventos RFID.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(config = {}, default = WEBrick::Config::General) ⇒ RfidServer

Crea un nuevo servidor RFID utilizando el archivo de configuracion “rfid_config.yml”, adicionalmente instancia la base de datos SQLite de eventos para su uso porterior.



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# File 'lib/event_handler/rfid_server.rb', line 42

def initialize(config={}, default=WEBrick::Config::General)
  @interface_client =     RfidInterfaceClient.new
  p =                     @interface_client.config["local_config"]["port"]
  ip =                    @interface_client.config["local_config"]["ip_address"]
  @timeout =              @interface_client.config["local_config"]["timeout"]
  config[:Port] =         p unless p.nil?
  config[:BindAddress] =  ip unless ip.nil?
  @is_attach =            false
  @active =               false
  @active_remote =        false
  @mutex =                Mutex.new
  super
  @db =                   SQLite3::Database.new('rfid_events.db')
end

Instance Attribute Details

#active ⇒ Object (readonly)

Referencia logica para la activacion o no del muestreo de eventos RFID



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# File 'lib/event_handler/rfid_server.rb', line 25

def active
  @active
end

#active_remote ⇒ Object (readonly)

Referencia logica para la activacion o no del muestreo de eventos RFID remoto



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# File 'lib/event_handler/rfid_server.rb', line 27

def active_remote
  @active_remote
end

#interface_client ⇒ Object (readonly)

Representa una referencia a una interfaz cliente para consultas hacia otros servidores RFID



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# File 'lib/event_handler/rfid_server.rb', line 19

def interface_client
  @interface_client
end

#is_attach ⇒ Object (readonly)

Referencia logica para la presencia o no del lector RFID



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# File 'lib/event_handler/rfid_server.rb', line 23

def is_attach
  @is_attach
end

#mutex ⇒ Object (readonly)

Referencia a un semaforo de sincronizacion de captura de eventos RFID



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# File 'lib/event_handler/rfid_server.rb', line 35

def mutex
  @mutex
end

#reader ⇒ Object (readonly)

Referencia al lector RFID conectado al servidor



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# File 'lib/event_handler/rfid_server.rb', line 21

def reader
  @reader
end

#timeout ⇒ Object (readonly)

Referencia al tiempo de espera para conectar el lector RFID



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# File 'lib/event_handler/rfid_server.rb', line 29

def timeout
  @timeout
end

#verbose ⇒ Object (readonly)

Representa una referencia al monitor de enventos le lectura de tags RFID



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# File 'lib/event_handler/rfid_server.rb', line 31

def verbose
  @verbose
end

#verbose_remote ⇒ Object (readonly)

Representa una referencia al monitor de enventos le lectura de tags RFID remoto



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# File 'lib/event_handler/rfid_server.rb', line 33

def verbose_remote
  @verbose_remote
end

Instance Method Details

#run(sock) ⇒ Object

Recibe y procesa los comandos, a continuacion se muestra una lista de los comandos soportados y una breve descripcion de su funcion:

attach:       		Attach a new RFID reader
detach:       		Detach the RFID reader
ls|list|reader:   	Serial of RFID reader
n|name:       		Name of RFID reader 
t|type:       		Type of RFID reader
version:       		Version of RFID reader
verbose:   		Initialize the observer of RFID events 
stop:	   		Stop the observer of RFID events
server:       		List all servers 
set [id_of_server]:	Change the current server
current:   		Show the current server selected
select [SQL]:     	Consulta de tipo SQL a la base de datos SQLite
quit|close|exit:  	Close the connection with de server



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# File 'lib/event_handler/rfid_server.rb', line 75

def run(sock)
  while true
    cmd = sock.gets
    case cmd
      when /\bclose|exit|quit\W/
      sock.print "Shutting down..."
      break
      # ************************* servers ******************************
      when /\bservers\W/
      if @interface_client.servers>0
        @interface_client.config.each do |key, value| 
          sock.print "Server: #{key} #{value["ip_address"]}:#{value["port"]}, Id of server: #{value["id_server"]}\n"
        end
      else
        sock.print "ERROR: No Server Found!\n"
      end
      # ************************* current server ******************************
      when /\bcurrent\W/
      server_name = @interface_client.id_server
      sock.print "Server: #{server_name} #{@interface_client.config[server_name]["ip_address"]}:#{@interface_client.config[server_name]["port"]} , Id of server: #{@interface_client.config[server_name]["id_server"]}\n"
      # ************************* set server ******************************
      when /\bset\s+([0-9A-Za-z])+/
      if @interface_client.servers>0
        @interface_client.set_server(sock,cmd.split(/\s/)[1])
      else
        sock.print "ERROR: No Server Found!\n"
      end
      # ************************* attach **********************************
      when /\battach\W(\s*-r)?/
      if @interface_client.id_server.eql?("local_config")
        if !@is_attach
          begin
            @reader = PhidgetRfidReader.new(@timeout)
            @is_attach = true
            sock.print "Device #{@reader.serial} found!\n"
          rescue Exception => e
            sock.print "ERROR: #{e}\n"
          end
        else
          sock.print "ERROR: An RFID reader is attached!\n"
        end
      elsif @interface_client.servers>0
        @interface_client.single_consult(sock,"attach -r\n")
      end
      if cmd.split(/\s/)[1].eql?("-r")
        break
      end
      # ************************* ls|list|reader **********************************
      when /\bls|list|reader\W(\s*-r)?/
      if @interface_client.id_server.eql?("local_config")
        if @is_attach
          sock.print "#{@reader.serial}\n"
        else
          sock.print "ERROR: No device found!\n"
        end
      elsif @interface_client.servers>0
        @interface_client.single_consult(sock,"ls -r\n")
      end
      if cmd.split(/\s/)[1].eql?("-r")
        break
      end
      # ************************* name **********************************
      when /\bn|name\W(\s*-r)?/
      if @interface_client.id_server.eql?("local_config")
        if @is_attach
          sock.print "#{@reader.name}\n"
        else
          sock.print "ERROR: No device found!\n"
        end
      elsif @interface_client.servers>0
        @interface_client.single_consult(sock,"n -r\n")
      end
      if cmd.split(/\s/)[1].eql?("-r")
        break
      end
      # ************************* type **********************************
      when /\bt|type\W(\s*-r)?/
      if @interface_client.id_server.eql?("local_config")
        if @is_attach
          sock.print "#{@reader.type}\n"
        else
          sock.print "ERROR: No device found!\n"
        end
      elsif @interface_client.servers>0
        @interface_client.single_consult(sock,"t -r\n")
      end
      if cmd.split(/\s/)[1].eql?("-r")
        break
      end
      # ************************* version **********************************
      when /\bversion\W(\s*-r)?/
      if @interface_client.id_server.eql?("local_config")
        if @is_attach
          sock.print "#{@reader.version}\n"
        else
          sock.print "ERROR: No device found!\n"
        end
      elsif @interface_client.servers>0
        @interface_client.single_consult(sock,"version -r\n")
      end
      if cmd.split(/\s/)[1].eql?("-r")
        break
      end
      # ************************* detach **********************************
      when /\bdetach\W(\s*-r)?/
      if @interface_client.id_server.eql?("local_config")
        if @is_attach
          @reader.delete
          @is_attach = false
          if @active
            @verbose.exit
            @active = false
          end
          sock.print "Device #{@reader.serial} detached!\n"
        else
          sock.print "ERROR: No device found!\n"
        end
      elsif @interface_client.servers>0
        @interface_client.single_consult(sock,"detach -r\n")
      end
      if cmd.split(/\s/)[1].eql?("-r")
        break
      end
      # ************************* detachall **********************************
      # when /\bdetachall\W/
      # @readers.each do |s,r|
      #   sock.print "Device #{r.serial} detached!\n"
      #   r.delete
      # end
      # @readers.clear
      # ************************* consult **********************************
      when /\bconsult/
      @db.execute(cmd.split("consult")[1]) do |row|
        row.each do |col|
          sock.print "#{col.to_s};"
        end
        sock.print "\n"
      end
      break
      # ************************* select SQL **********************************
      when /\bselect/
      begin
        if @interface_client.id_server.eql?("local_config")
          @db.execute(cmd) do |row|
            row.each do |col|
              sock.print "#{col.to_s};"
            end
            sock.print "\n"
          end
        elsif @interface_client.servers>0
          @interface_client.consult(sock,"consult #{cmd}")
        end
      rescue SQLite3::SQLException => e
        sock.print "ERROR: #{e}\n"
      rescue Exception => e
        sock.print "ERROR: #{e}\n"
      end
      # ******************** Mostrar eventos a cierta frecuencia ************************
      when /\bverbose\W(\s*-r)?/
      if @interface_client.id_server.eql?("local_config")
        if !@active and @is_attach
          @active = true
          tag = 0
          opt = cmd.split(' ')[1]
          @verbose = Thread.new(opt) do
            while true
              if @reader.count > tag
                tag = @reader.count
                sock.print "Reader:#{@reader.serial} #{@reader.lastTag()}\n" 
              elsif !@active
                sock.print "MESSAGE: Stop Verbose\n"
                break
              else
                sock.print " "
              end
              sleep(0.1)
            end
          end
        end
      elsif @interface_client.servers>0
        if !@active_remote
          @active_remote = true
          @verbose_remote = Thread.new do
            @interface_client.consult(sock,"verbose -r -r")
          end
        end
      end
      # ************************* Parar Muestreo **********************************
      when /\bstop\W(\s*-r)?/
      if @interface_client.id_server.eql?("local_config")
        if @active
          #sock.print "MESSAGE: Stop Verbose\n"
          @active = false
          #@verbose.exit
        end
      elsif @interface_client.servers>0
        if @active_remote
          @interface_client.single_consult(sock,"stop -r\n")
          #@verbose_remote.exit
          @active_remote = false
        end
      end
      if cmd.split(/\s/)[1].eql?("-r")
        break
      end
      # ************************* h|help **********************************
      when /\bh|help\W/
      sock.print "attach:             Attach a new RFID reader\n"
      sock.print "detach:             Detach the RFID reader\n"
      sock.print "ls|list|reader:     Serial of RFID reade\n"
      sock.print "n|name:             Name of RFID reader\n"
      sock.print "t|type:             Type of RFID reader\n"
      sock.print "version:            Version of RFID reader\n"
      sock.print "verbose:            Initialize the observer of RFID events\n"
      sock.print "stop:               Stop the observer of RFID events\n"
      sock.print "server:             List all servers\n"
      sock.print "set [id_of_server]: Change the current server\n"
      sock.print "current:            Show the current server selected\n"
      sock.print "select [SQL]:       Consulta de tipo SQL a la base de datos SQLite\n"
      sock.print "quit|close|exit:    Close the connection with de server\n"
    else
      sock.print "ERROR: Unknown command! Type h or help for Help\n"
    end
  end
end